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230420221 = 1137872591
BaseRepresentation
bin11011011101111…
…10111011111101
3121001120120010021
431232332323331
5432441421341
634510412141
75465353033
oct1556767375
9531516107
10230420221
11109080139
1265201051
1338978635
1422860553
15153679d1
hexdbbeefd

230420221 has 8 divisors (see below), whose sum is σ = 232844544. Its totient is φ = 228002880.

The previous prime is 230420219. The next prime is 230420243. The reversal of 230420221 is 122024032.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 230420221 - 21 = 230420219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 230420195 and 230420204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230420321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87636 + ... + 90226.

It is an arithmetic number, because the mean of its divisors is an integer number (29105568).

Almost surely, 2230420221 is an apocalyptic number.

It is an amenable number.

230420221 is a deficient number, since it is larger than the sum of its proper divisors (2424323).

230420221 is a wasteful number, since it uses less digits than its factorization.

230420221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 230420221 is about 15179.5988418667. The cubic root of 230420221 is about 613.0654800465.

Adding to 230420221 its reverse (122024032), we get a palindrome (352444253).

The spelling of 230420221 in words is "two hundred thirty million, four hundred twenty thousand, two hundred twenty-one".

Divisors: 1 113 787 2591 88931 292783 2039117 230420221